91699553617 has 32 divisors (see below), whose sum is σ = 110161658880. Its totient is φ = 74672808000.

The previous prime is 91699553609. The next prime is 91699553669. The reversal of 91699553617 is 71635599619.

It is not a de Polignac number, because 91699553617 - 2³ = 91699553609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91699553677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4218258 + ... + 4239940.

It is an arithmetic number, because the mean of its divisors is an integer number (3442551840).

Almost surely, 2^91699553617 is an apocalyptic number.

It is an amenable number.

91699553617 is a deficient number, since it is larger than the sum of its proper divisors (18462105263).

91699553617 is a wasteful number, since it uses less digits than its factorization.

91699553617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22053.

The product of its digits is 13778100, while the sum is 61.

The spelling of 91699553617 in words is "ninety-one billion, six hundred ninety-nine million, five hundred fifty-three thousand, six hundred seventeen".